Add an example chat program for the C++ API.

[meshlink] / examples / chat.c

diff --git a/examples/chat.c b/examples/chat.c
index 21ced7b092ad0ee17d1021581e3bbddf506e7bc0..70d17d7d917bf6515aaf98d1fb97bea2f969df22 100644 (file)
--- a/examples/chat.c
+++ b/examples/chat.c
@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 #include "../src/meshlink.h"
 
 static void log_message(meshlink_handle_t *mesh, meshlink_log_level_t level, const char *text) {
@@ -72,9 +73,41 @@ static void parse_command(meshlink_handle_t *mesh, char *buf) {
                meshlink_blacklist(mesh, node);
 
                printf("Node '%s' blacklisted.\n", arg);
+       } else if(!strcasecmp(buf, "who")) {
+               if(!arg) {
+                       meshlink_node_t *nodes[100];
+                       size_t n = meshlink_get_all_nodes(mesh, nodes, 100);
+                       if(!n) {
+                               fprintf(stderr, "No nodes known!\n");
+                       } else {
+                               printf("Known nodes:");
+                               for(int i = 0; i < n && i < 100; i++)
+                                       printf(" %s", nodes[i]->name);
+                               if(n > 100)
+                                       printf(" (and %zu more)", n - 100);
+                               printf("\n");
+                       }
+               } else {
+                       meshlink_node_t *node = meshlink_get_node(mesh, arg);
+                       if(!node) {
+                               fprintf(stderr, "Unknown node '%s'\n", arg);
+                       } else {
+                               printf("Node %s found\n", arg);
+                       }
+               }
        } else if(!strcasecmp(buf, "quit")) {
                printf("Bye!\n");
                fclose(stdin);
+       } else if(!strcasecmp(buf, "help")) {
+               printf(
+                       "<name>: <message>     Send a message to the given node.\n"
+                       "                      Subsequent messages don't need the <name>: prefix.\n"
+                       "/invite <name>        Create an invitation for a new node.\n"
+                       "/join <invitation>    Join an existing mesh using an invitation.\n"
+                       "/kick <name>          Blacklist the given node.\n"
+                       "/who [<name>]         List all nodes or show information about the given node.\n"
+                       "/quit                 Exit this program.\n"
+                       );
        } else {
                fprintf(stderr, "Unknown command '/%s'\n", buf);
        }
@@ -151,7 +184,7 @@ int main(int argc, char *argv[]) {
 
        meshlink_handle_t *mesh = meshlink_open(confbase, nick);
        if(!mesh) {
-               fprintf(stderr, "Could not open MeshLink: %s\n", mesh->errstr);
+               fprintf(stderr, "Could not open MeshLink!\n");
                return 1;
        }
 
@@ -164,7 +197,7 @@ int main(int argc, char *argv[]) {
                return 1;
        }
 
-       printf("Chat started.\n");
+       printf("Chat started.\nType /help for a list of commands.\n");
 
        while(fgets(buf, sizeof buf, stdin))
                parse_input(mesh, buf);